SU1427404A1 - Code to analog converter - Google Patents

Abstract

The invention relates to automatics and computing and can be used as a code converter, an analogue in synchronous transmissions and analog information systems. The aim of the invention is to simplify the converter code - analogue when using a selsin. The goal is achieved by the fact that in the converter containing the setting device I number pulse code, selsyn 2 with rotor winding 8 and synchronization windings 9, 10, 11, alternating voltage source 7, keys 4, 5, counter 3 and third key 6 are introduced. Introduction the counter 3 and the third key 6 allows controlling the synchronization windings by pairwise closing them onto a common bus and, therefore, excluding linear power amplifiers from the converter circuit and thereby greatly simplifying the converter. 1 il. sl 4; u 1 4

Description

The invention relates to automation and computer technology and can be used as a code converter - an analogue in synchronous transmissions of the angle of rotation of the shaft and analog information systems. :. The aim of the invention is to simplify a code-to-analog converter by alternately generating zero voltages on a pair of sync windings.

The drawing shows a block diagram of a code converter - analog, i Converter code - analog contains a setting unit of 1 pulse code, selsyn 2, counter 3, first 4, second 5 and third 6 keys, source: 7 alternating voltage, rotary; winding 8 selsyn, windings 9, 10 and 11 synchronize selsyn.

The converter works as follows.

The output signal of target 1 is the number of pulses per unit of time, which is proportional to the measured value: Chin; is converted by counter 3 into three sequences of pulses received at the first inputs (control) of keys 4, 5 and 6. By this, the arrival of pulses from setpoint 1 to counter 3 causes the keys 4 and 5 to be successively locked in pairs, then keys 5 and 6, then keys 6 and 4, and so on. When the keys are paired, and consequently, the synchronization windings on the common bus, the voltage generated in them creates currents in these windings. Depending on the relative position of the windings 9, 10 and AND synchronization, closed on the bus, in the rotary winding 8 selsin 2 there is a moment of synchronization (M) which may have one or another direction or

five

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5 o

be null. Under the action of synchronization, the rosin of the selsyn 2 rotates in one direction by 60. Thus, the angle of rotation of the rotor is proportional to the total number of pulses at the output of the setpoint 1.

In the proposed converter, during the formation of voltages on the coils of sigosronization, power amplifiers are not used, which require for their operation power sources interfacing with the level of induced voltages. Due to the fact that the voltage shaping elements on the synchronization windings operate in the key mode, power is not dissipated on them and they can be made in an integral design. In this case, the device is greatly simplified, and therefore, the reliability of the converter as a whole increases,

Claims (1)

Invention Formula The converter code is an analogue that contains the master of the pulse code, the selsyn, the rotor winding of which is connected to a source of alternating voltage, the first and second keys, differing in that, in order to simplify the converter, a counter and a third key are entered into it, the master output of the pulse code connected to the input of the meter, the first, second and third outputs of which are connected to the first inputs of the first, second and third keys, respectively, the second inputs of which are connected to the main switch, the bus, the outputs of the first, second and third its keys are connected to the first, second and third synchronization windings of the selsyn, respectively.